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From 3afec946845a02a8fce94d00abda9b4c8abcbce0 Mon Sep 17 00:00:00 2001
From: John Ogness <john.ogness@linutronix.de>
Date: Fri, 15 Feb 2019 11:03:59 +0106
Subject: [PATCH 3/7] hello: add pci memory mapping
Signed-off-by: John Ogness <john.ogness@linutronix.de>
---
hello.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/hello.c b/hello.c
index db50302..58a64e5 100644
--- a/hello.c
+++ b/hello.c
@@ -12,6 +12,7 @@ struct hello_dev {
struct device *dev;
struct cdev cdev;
unsigned int minor;
+ void __iomem *mem;
};
#define HELLO_MAX_DEVICES 10
@@ -120,6 +121,12 @@ static int hello_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
pci_set_master(pdev);
+ hello->mem = pci_iomap(pdev, 2, 0);
+ if (!hello->mem) {
+ ret = -ENOMEM;
+ goto err_regions;
+ }
+
devt = MKDEV(MAJOR(hello_devt), hello->minor);
cdev_init(&hello->cdev, &hello_fops);
@@ -127,7 +134,7 @@ static int hello_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
ret = cdev_add(&hello->cdev, devt, 1);
if (ret != 0) {
dev_err(&pdev->dev, "cdev_add failed\n");
- goto err_regions;
+ goto err_iomap;
}
dev = device_create(hello_class, &pdev->dev, devt, hello,
@@ -144,6 +151,8 @@ static int hello_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
err_cdev:
cdev_del(&hello->cdev);
+err_iomap:
+ pci_iounmap(pdev, hello->mem);
err_regions:
pci_release_regions(pdev);
err_enable:
@@ -159,6 +168,7 @@ static void hello_remove(struct pci_dev *pdev)
device_destroy(hello_class, MKDEV(MAJOR(hello_devt), hello->minor));
cdev_del(&hello->cdev);
+ pci_iounmap(pdev, hello->mem);
pci_release_regions(pdev);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
--
2.11.0
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